Add Weaviate Cloud queries article.

[randyfong]

What's being changed:

Blog updated to include article about Weaviate Cloud queries.

Type of change:

• [ ] Content updates – blog, podcast (non-breaking change to add/update content)

How Has This Been Tested?

• [ ] Local build - the site works as expected when running yarn start

[itsajchan]

Thanks for the contribution Randy! I'll review this with you directly over Slack.

[weaviate-git-bot]

To avoid any confusion in the future about your contribution to Weaviate, we work with a Contributor License Agreement. If you agree, you can simply add a comment to this PR that you agree with the CLA so that we can merge.

beep boop - the Weaviate bot 👋🤖

PS:
Are you already a member of the Weaviate Slack channel?